Koihime Musou Temporada 2 Episódio 9

Ryuubi is really happy about giving her sword back. In the way to return Touka, the party stops to rest in a village. Theyre mistaken to bandits, then their leaders Riten and Ukin attack them. Shortly after that, the mistake is clear and their other leader, Gakushin, brings a formal excusement to them. They find out Gakushins group plans to join Sousous army due to her good impression, but the bandits around there attack them many times and they dont have plans to defeat all the bandits, though. Ryuubis party decide to help them. Koumei plans to use the Ryuujin-ko (the near lake) to help defeat the bandits (a flood attack using the rain, the bridge, the lake and the riverbed). They build a floodgate due to Ritens construction talent.